@article{fdi:010068216,
  title = {{M}esoscale {SST}-wind stress coupling in the {P}eru-{C}hile current system : which mechanisms drive its seasonal variability ?},
  author = {{O}erder, {V}. and {C}olas, {F}ran{\c{c}}ois and {E}chevin, {V}incent and {M}asson, {S}. and {H}ourdin, {C}. and {J}ullien, {S}. and {M}adec, {G}. and {L}emarie, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}atellite observations and a high-resolution regional ocean-atmosphere coupled model are used to study the air/sea interactions at the oceanic mesoscale in the {P}eru-{C}hile upwelling current system. {C}oupling between mesoscale sea surface temperature ({SST}) and wind stress ({WS}) intensity is evidenced and characterized by correlations and regression coefficients. {B}oth the model and the observations display similar spatial and seasonal variability of the coupling characteristics that are stronger off {P}eru than off {N}orthern {C}hile, in relation with stronger wind mean speed and steadiness. {T}he coupling is also more intense during winter than during summer in both regions. {I}t is shown that {WS} intensity anomalies due to {SST} anomalies are mainly forced by mixing coefficient anomalies and partially compensated by wind shear anomalies. {A} momentum balance analysis shows that wind speed anomalies are created by stress shear anomalies. {N}ear-surface pressure gradient anomalies have a negligible contribution because of the back-pressure effect related to the air temperature inversion. {A}s mixing coefficients are mainly unchanged between summer and winter, the stronger coupling in winter is due to the enhanced large-scale wind shear that enables a more efficient action of the turbulent stress perturbations. {T}his mechanism is robust as it does not depend on the choice of planetary boundary layer parameterization.},
  keywords = {{O}cean-atmosphere interactions ; {M}esoscale {SST}-wind stress coupling ; {R}egional coupled modeling ; {E}astern {B}oundary {U}pwelling {S}ystem ; {PEROU} ; {CHILI}},
  booktitle = {},
  journal = {{C}limate {D}ynamics},
  volume = {47},
  numero = {7-8},
  pages = {2309--2330},
  ISSN = {0930-7575},
  year = {2016},
  DOI = {10.1007/s00382-015-2965-7},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068216},
}